Loud speaker



W. H. VIDOR LOUD SPEAKER Filed June 25,' 1925 '-5, /l y l ..ww

y INI/ENTOR Gam/jf- 013 vf/M ATTORWs S Patented Oct. 2, 1928.

UNITED STATES PATENT OFFICE.

'WILLIAM H. VIDR, OF MAPLEWOOD, NEW JERSEY, ASSIGNOR TO GLORIA MANU-FACTURING CORP., OF NEWARK, NEW. JERSEY, A CORPDRATION OF N EW JERSEY.

LOUD SPEAKER.

Application led .Tune 25, 1925. Serial No. 39,448.

This invention relates to devices adapted to be actuated magnetically ormechanically to produce amplified sound waves, such devices beingcommonly lrnown as loud speake ers.

The invention has for its principal object to provide an apparatuswhereby transmitted sound is reproduced in amplified volume, and with ahigh degree of resonance and clarity;

11a and to this end the invention consists in providing a novelconstructioniof vibratable dia hragm or resonator, with means foractuactlng the same, and a suitable support thereior. r

Other objects of this invention, not at this time more particularlyenumerated, will be clearly understood from the following de-v taileddescription of the same.

The objects of this invention are achieved 2U by the novel design,construction and combination of parts hereinafter described andillustrated in the accompanying drawings, forming a material part ofthis disclosure, and in which Figure l is a front elevation of a comlete embodiment of this invention as arrange for operation.

Figure 2 is a vertical sectional view of the same taken on line 2-2 inFigure 1..

Similar characters of reference are employed in said above describedviews, to indicate corresponding parts.

y The novel diaphragm or resonator, with the means for actuating thesame, is provided with a suitable support. This support may be made invarious styles, designs or shapes. One satisfactory design and shape ofsupport is shown in the drawmgs, the same com rising a base 10 fromwhich project upwar ly oppositely directed outwardly bowed arms 11, theupper ends of which terminate in a headpiece 12, vertically spaced abovesaid base. Said headiece 12 is provided in its under side with a ciamber 13.

Secured within the chamber 13 is a balanced telephone receiving unit,generally desi ated by the reference character 14, whic is adapted toreceive electrical impulses, produced by the sound waves to betransmitted in the usual manner, whereby a vibrator arm or element 15with which the same is equipped is actuated.

Secured to said vibrator arm or element 15 is a downwardly extending rod16 to which is attached a collar 17 adjustably held by a set-screw 18,or otherwise securely fastened to said rod. Suitably connected at itsapex with said lcollar 17 is an outwardly flaring conical or bell-shapeddiaphragm or resonator 19. The lower annular end of said diaphragm orresonator 19 has connected to it a reversed or inverted truncatedconical eiement 20 providing an opening or mouth at its lower portion.Secured to the marginal portions of said opening or mouth is a rigidring-member 21, which may be made of any suitable material, such aswood, metal, etc. stiien and reenforce the element 20, and at the sametime, by its weight, provide the diaphragm or resonator with suicientinertia to assure a proper reaction of the same to the vibrationsimparted thereto by transmission from the vibrator arm or element 15 ofthe receiving unit 14 through the rod 16, whereby the desiredreproduction of sound waves in ampiiied volume and resonance is effectedby said diaphragm or resonator. v

The elements 19 and 20, comprising the diaphragm or resonator, arepreferably made from parchment, heavy paper, or some similar material,and are adapted to act as a sound box 'serving both to reproduce and'amplify while at the same time clarifying the sound desired to betransmitted.

It has been determined by practical experiment that the sound producedby my novel device is not only greater in volume, but in-clarity andresonance of tone is far superior to that hitherto attained by loudspeakers of ordinary types of construction. I attribute the superiorresults obtained by my device, in the respects above mentioned, to thefact that the diaphra m or resonator possesses'a minimum of initialstress (the inertia of the weight of the ring-member 21 being the mainfactor which provides the basis for the reaction of the diaphragm orresonator to imparted vibrations), and consequently my device is moresensitive and is capable of respending more faithfully to the sound frequencies of music, speech or other sound forms.

As changes of construction could be made within the scope of theinvention, it is intended that all matter ,contained in the fore- Saidringmember 21 serves both to l going description or shown in theaccompanying drawings shall be interpreted as illustrative and not in alimiting sense.

Having thus described my invention, I claim 1. A loud speaker comprisinga support, a balanced telephone receiving unit affixed to said support,a vertical vibrating rod actuated by said unit, and a diaphragm meanssupported solely by said rod and adapted to be vibrated thereby, saiddiaphragm means consisting of two hollowr conical elements connectcd attheir base edges, the lower element being truncated and open at itscenter, the upver element being ailixed at its apex to said ro 2. A loudspeaker comprising a support, a balanced telephone receiving unitaffixed to said support, a vertical vibrating rod actuated by said unit,a diaphragm means supported solely by said rod and adapted to bevibrated thereby, said diaphragm means consisting of two hollow conicalelements connected at their base edges, the lower element beingtruncated and open at its center, and a weight ring connected with theopen bottom end of said lower element, the upper element being affixedat its apex to said rod.

3. A loud speaker comprising asupport, a balanced telephone receivingunit aixed to said support, a vertical vibrating rod actuated by saidunit, a diaphragm means consisting of two hollow conical elementscoiinected at their base edges, the lower element being truncated andopen at its center, and means at the apex of said upper element foradjustably attaching said diaphragm means to said rod to both supportand vibrate the same.

4. A loud speaker comprising a support, a balanced telephone receivingunit affixed to said support, a vertical vibrating rod actuated by saidunit, a diaphragm means consisting of two hollow conical elementsconnected at their base edges, the lower element being truncated andopen at its center, a weight ring connected with the bottom open end ofsaid lower element, and means at the apex'of said upper element foradjustably attaching said diaphragm means to said rod to both supportandvibrate the same.

5. A loud speaker comprising a support, a hollow head on said support, amagnetic telephone receiver device secured within said head, a pendanthollow resonator means engaged with and operated by said telephonereceiver device, said resonator means having an open lower free end, anda Weight-ring connected with the lower open free end of said resonatormeans.

In testimony that I claim the invention as set forth above I havehereunto set my hand this 20th day of June, 1925.

VILLIAM H. VIDOR.

